Which one of the following is a passive element to an electric circuit?

SSC JE Electrical 2018 with solution SET-1
Which one of the following is a passive element to an electric circuit?

Battery

Resistors

Voltage source

Current source

Battery

Resistors

Voltage source

Current source

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SSC JE Electrical 2018 with solution SET-1
For Proper Operation of the transistor, its collector should have

Very small size

None of these

Proper Reverse Bias

Proper Forward Bias

Very small size

None of these

Proper Reverse Bias

Proper Forward Bias

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A Bipolar Junction Transistor (BJT) is a three-layer, two junction semiconductor device consisting of either two N-type and one P-type layer of material (NPN transistor) or two P-type and one N-type layer of material (PNP transistor). A transistor can be visualized as two back-to-back connected diodes; by placing two PN junctions together, we can create a bipolar transistor with the three terminals – emitter, base, and collector. The term bipolar is to justify the fact that holes and electrons participate in the injection process into the oppositely polarised material. If only one carrier is employed (electron or hole), it is considered a unipolar device. For proper working of the transistor, the two junctions of the transistor should be properly biased, the base-emitter (J1) junction should be forward biased and the base-collector (J2) junction should be reverse biased. In a PNP transistor, the majority charge carriers are holes and germanium is favored for these devices. In an NPN transistor, the majority charge carriers are electrons and silicon is best for NPN transistors. The thin and lightly doped middle layer is known as the base (B) and the two outer regions are known as the emitter (E) and the collector (C).
Under the proper operating conditions, the emitter region emits or injects majority charge carriers into the base region and because the base is very thin, most of these electrons will ultimately reach the collector. The emitter is highly doped to reduce resistance and emit more majority charge carriers. The collector is lightly doped to reduce the junction capacitance of the collector-base junction. The schematics and the circuit symbols for bipolar transistors are shown in Fig. The arrows on the schematic symbols indicate the direction of emitter-current flow. The collector is usually at a higher voltage than the emitter and for proper operation, the base-emitter junction is forward biased while the collector-base junction is reverse biased.

SSC JE Electrical 2018 with solution SET-1
What is the peak-to-peak value of a sinusoidal voltage (in V) having the average value of 100 V?

282.88

159.98

141.44

314

282.88

159.98

141.44

314

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SSC JE Electrical 2018 with solution SET-1
A 40KVA transformer has a core loss of 450 W and total loss of 800 W. Find the copper loss for Maximum efficiency

450 W

350 W

300 W

800 W

450 W

350 W

300 W

800 W

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SSC JE Electrical 2018 with solution SET-1
In a synchronous motor which loss varies with the load?

Core Loss

Copper Loss

Bearing friction Loss

Windage loss

Core Loss

Copper Loss

Bearing friction Loss

Windage loss

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SSC JE Electrical 2018 with solution SET-1
Calculate the phase angle between the voltage and current phasor of a series RL circuit having the resistance of 65 Ohms and Inductive reactance of 37.53 ohms when supplied by a frequency of 60 Hz

45°

60°

30°

15°

45°

60°

30°

15°

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SSC JE Electrical 2018 with solution SET-1

SSC JE Electrical 2018 with solution SET-1 Which one of the following is a passive element to an electric circuit?

SSC JE Electrical 2018 with solution SET-1 For Proper Operation of the transistor, its collector should have

SSC JE Electrical 2018 with solution SET-1 What is the peak-to-peak value of a sinusoidal voltage (in V) having the average value of 100 V?

SSC JE Electrical 2018 with solution SET-1 A 40KVA transformer has a core loss of 450 W and total loss of 800 W. Find the copper loss for Maximum efficiency

SSC JE Electrical 2018 with solution SET-1 In a synchronous motor which loss varies with the load?

SSC JE Electrical 2018 with solution SET-1 Calculate the phase angle between the voltage and current phasor of a series RL circuit having the resistance of 65 Ohms and Inductive reactance of 37.53 ohms when supplied by a frequency of 60 Hz

SSC JE Electrical 2018 with solution SET-1
Which one of the following is a passive element to an electric circuit?

SSC JE Electrical 2018 with solution SET-1
For Proper Operation of the transistor, its collector should have

SSC JE Electrical 2018 with solution SET-1
What is the peak-to-peak value of a sinusoidal voltage (in V) having the average value of 100 V?

SSC JE Electrical 2018 with solution SET-1
A 40KVA transformer has a core loss of 450 W and total loss of 800 W. Find the copper loss for Maximum efficiency

SSC JE Electrical 2018 with solution SET-1
In a synchronous motor which loss varies with the load?

SSC JE Electrical 2018 with solution SET-1
Calculate the phase angle between the voltage and current phasor of a series RL circuit having the resistance of 65 Ohms and Inductive reactance of 37.53 ohms when supplied by a frequency of 60 Hz